GmatPrep?? (Slope)

This topic has expert replies
Master | Next Rank: 500 Posts
Posts: 446
Joined: Thu Jul 26, 2007 1:07 pm
Thanked: 6 times

GmatPrep?? (Slope)

by dferm » Wed Sep 03, 2008 4:27 pm
Please Help...
Attachments
slope2.jpg

Legendary Member
Posts: 1153
Joined: Wed Jun 20, 2007 6:21 am
Thanked: 146 times
Followed by:2 members

Re: GmatPrep?? (Slope)

by parallel_chase » Wed Sep 03, 2008 5:41 pm
dferm wrote:Please Help...
for ax+by+c=0

slope = -a/b

Statement I & II are clearly insufficient when taken alone.

Combining I & II

x intercept = 2
y intercept = 3

slope = -2/3

Junior | Next Rank: 30 Posts
Posts: 16
Joined: Sun Jul 27, 2008 9:45 pm
Thanked: 2 times

Re: GmatPrep?? (Slope)

by aspire750 » Wed Sep 03, 2008 10:23 pm
parallel_chase wrote:
dferm wrote:Please Help...
for ax+by+c=0

slope = -a/b

Statement I & II are clearly insufficient when taken alone.

Combining I & II

x intercept = 2
y intercept = 3

slope = -2/3
Although the answer is correct but explanation is flawed.

Stm1. the x-intercept of line K is 2 means it passes through (2,0)
Stm2. the y-intercept of line K is 3 means it passes through (0,3)

Slope of a line = (y2-y1)/(x2-x1)= -3/2 in this case.

Legendary Member
Posts: 829
Joined: Mon Jul 07, 2008 10:09 pm
Location: INDIA
Thanked: 84 times
Followed by:3 members

Re: GmatPrep?? (Slope)

by sudhir3127 » Thu Sep 04, 2008 4:46 am
aspire750 wrote:
parallel_chase wrote:
dferm wrote:Please Help...
for ax+by+c=0

slope = -a/b

Statement I & II are clearly insufficient when taken alone.

Combining I & II

x intercept = 2
y intercept = 3

slope = -2/3


Although the answer is correct but explanation is flawed.

Stm1. the x-intercept of line K is 2 means it passes through (2,0)
Stm2. the y-intercept of line K is 3 means it passes through (0,3)

Slope of a line = (y2-y1)/(x2-x1)= -3/2 in this case.
the slope is -3/2

X/a+Y/b =1
X/2+ Y/3 = 1
3x+2y=6

slope -a/b

-3/2.